Metal culvert.



B. W. HARRIS. METAL GULVBRT.

APPLICATION.PILBD SEPTA], 190a.

Patented Nov. 17, 1908.

6 5 R Y R Z W 7. i N 0 Z 1 Z a m M E E W/ r/vas .5 55 M W :pensive means for securing the en BERNHAHD W. HARRIS, OF MINNEA POLIS. MINNESOTA.

METAL CULVERT.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Application filed September 8, 1908. Serial No. 461,918.

To all whom it may concern.-

Be it known that I, Berni-mun W. HARRIs, of Minneapolis, Hcnnepin count Minnesota, have invented certain new an useful Improvements in Metal Culverts, of which the following is a specification.

My invention relates to a metallic tubing or pipe adapted for use as a culvert and the primary ob ect of the invention, is to provide a sim 1e, economical method for securing the encs of the culvert pipe sections to gether, such means embodyin but few parts and permitting the assembling of the sections at the work with but little labor and without the use'of special tools.

Mg invention consists generally in various 0 nstructions and combinations all as hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings forming partrof this spec1fication,Figu re 1, is a side View of a portion ofa culvert partiall in section, to illustrate the manner of securing the ends of the sections together, Fig. 2, is a sectional view on the line of Fig. 1. Fig. 3, is a detail view of the end of one of the sections, Fig. 4, is a detail sectional view illustrating the preferred means employed for securingthe sections together.

In the drawing, Qand 3 represent respectively the abutt ng sections of the culvert pipe, each having outwardly turned flanges 4t at their ends, and pipe sections being provided with annular corrugations as usual in pipes of this kind. The pi e sections are made of suitable length at t e factory and shi mod to the work and there assembled and it is desirable to provide a sim le inextls of the contiguous sections together. Inthis case. I prefer to employ the means shown herewith. which consists in providing a series of rivets 5 in one of the flanges 4, having heads 6 which are adapted to pass throu h key-hole slots 7 provided in the flange of the abutting Jipe section. .In forming the keyhole slots, refer to provider-am surfaces 8 on one si e thereof, with which the heads 6 enga e, such engagement having the efleot when the pipe sections are rotate-'1, of drawing them snugly together. The can! surfaces may be formed in any Suitable way. but I prefer to press the edges ofthe slot outwardly as indicated in Fig. 4 tin-rein," forming the cam surfaces sinnlltaneour-alr with the pi'lnching out of the slots. The opening at one end. 01' the key-hole slot, is of sufilcicnt. size to allow the passage of the rivet hcad and. the narrower portion of the slot is adapted to receive the shank of the rivet, being too small to permit the passage of the head therethrough. \V hen the rivet heads are inserted into the slots, and the pipe sections rotated. the rivet heads will. slide on the cam surfaces, and draw the flanges into close contact with one another. I have shown six of the rivets and a. correspondin; number of slots. but this number may be varied ilCCOlCliIlQ' to the diameter of the pipe sections. In smaller pipes, the sections may he joined togctherat the factory, but in the case of large culverts. it will probably be more conveniel'lt to assemhle the sections: at the work, and after uniting them. roll or lower the. culvert into the ditch. The culvert sections united in thiswav. will be firmly and secureljt held together and. the work of uniting: them can be easily and expeditiously performed.

I claim as my invention 1. A culvert, comprising pipe sections having laterally extending flanges formed on the ends thereof. the flange one section hat; ing a series of rivets mounted therein with shanks and heads project in g from sai d flange in a direction parallel embstantiallv with the longitudinal axis of the section. and the other flange of the abutting section having a Stl'lts of keyhole slots which are adapted to receive at one end the hauls and shanksof said rivets and said slots having cam surfaces formed on their edges with which the heads of said rivets engage, when the pipe sections are rotated; and whereby the said flanges and sections will be drawn snugly lt),,l'(ll)t1'. sub.

stuntiallv as described.

2. A culvert, comprising pipe ct-tit' l'rhat in laterally extending flanges fol-lined on the on s thereof. one ofi sanl flanges having a series of rivets mounted therein at intervals, rotation of a pipe section, substantially as said rivets havin shanks and heads projectdescribed. 10 I ing beyond the p one of said flange, and the In witness whereof, I have hereunto set my flan e of the abutting section having a series 1 hand this third day of Se tember 1908.

of s ots adapted to receive the heads and BERNHAR W. HARRIS.

shanks of said rivets and means whereb, said Witnesses: flanges will be drawn together upon t e in- C. G. HANSON, sertlon of said rivets into said slots, and the W. E. DREssLER. 

